[Kim]

There was a workaround for invites, but it sounds like they closed that off, and email invites are temporarily deactivated.

I miss Facebook's "Like" feature, so I could "Like" anime and people would see a little thing saying, "Skyler and two others liked anime" or some such. You can +1 posts by people, though.

Sparks are an interesting feature, wherein you can get a little random-ass feed on stuff related to a particular "spark" which is something you're interested in. So, if I put yaoi, I can click on the spark and see links to yaoi videos or stuff about Yaoicon and all that jazz.

Circles are easily the best feature of Google+, as they let you split everyone up into little groups, allowing you to control who sees what posts of yours. Only want family to see a post? You can do that. Want everyone but your family to see a post? You can do that, too. It's interesting.

Beyond that, it's a lot like Facebook, but feels faster and smoother. I expect more features will be added in the future, and other features will be changed as well. If I get the ability to invite people, I'll let you all know so you can ask for some.